Reference b Test Procedure for Airborne Noise.pdf

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IM-272A/WDQ Airborne Noise Test Procedure 001553 Rev. X3

IM-272A/WDQ

First Article Test Procedure

Airborne Noise

28 May 2020

Contract No. N00167-19-C-0005

CDRL A001

DID DI-NDTI-80603A

Unclassified

Contractor: Spectral Labs Incorporated (SLI) 15920 Bernardo Center Drive

San Diego, CA 92127

DISTRIBUTION STATEMENT C: Distribution authorized to US Government Agencies and their contractors;

Administrative/Operational Use: 31 October 2019. Other requests for this document shall be referred to Naval

Sea Systems Command (NAVSEA 04ND).

This document could contain technical data, the export of which is restricted by the U.S. arms export control act (AECA) (TITLE 22, U.S.C. SEC 2751, ET SEQ.) Or the export administration act of 1979, as amended (TITLE 50, U.S.C., APP.2401, ET SEQ.).

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NSWCCD IM-272A/WDQ Airborne Noise Test Procedure

I Record of Changes

Revision Change Date Approval X1 Initial Release 10/31/2019 E. Ackermann X2 Update after Gov review 01/02/2020 E. Ackermann X3 Gov Review admin changes 05/28/2020 E. Ackermann

II Table of Contents

I Record of Changes II Table of Contents

1.0 Introduction

1.1 Purpose of Test

1.2 System to be Tested

1.2.1 Nomenclature

1.2.2 Model Number

1.2.3 Type of Test

1.2.4 Applicable Performance and Testing Specification Reference

1.3 Test Requirements

1.3.1 Test Article Configuration

1.3.2 Required Tests

1.3.3 Acceptance Criteria

1.3.4 Environmental Criteria

1.3.5 Table of Tests

1.4 Reference Documents

2.0 Support Requirement

3.0 Test Procedure

3.1 IM-272A/WDQ – Airborne Noise

3.2 Cautions and Safety Warnings

4.0 Data Sheet

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1.0 Introduction

This document describes the Airborne Noise test for the IM-272A/WDQ.

1.1 Purpose of Test

The objective of this test is to characterize the airborne noise signature for the IM-272A/WDQ.

1.2 System to be Tested

1.2.1 Nomenclature

IM-272A/WDQ

1.2.2 Model Number

1.2.3 Type of Test

First Article, Production Inspection

1.2.4 Applicable Performance and Testing Specification Reference Requirement Paragraphs: 3.2.6 The radiacmeter shall meet the noise requirements of “Air Particle Detector (APD) Noise Limit Specification”. The airborne and structure borne noise requirements are classified CONFIDENTIAL and are included in a separate document.

Test Paragraph: 4.5.10 The radiacmeter shall be tested in accordance with the requirements of “Air Particle Detector (APD) Noise Limit Specification”. The airborne and structure borne noise requirements are classified CONFIDENTIAL and are included in a separate document.

1.3 Test Requirements

1.3.1 Test Article Configuration

The IM-272A/WDQ test article shall have its front cover and access door installed and secure. A power cable will be attached, and the unit will be powered on during testing. No other external cables will be attached.

1.3.2 Required Tests

Conduct the test per MIL-STD-740-1 paragraph 5.

1.3.3 Acceptance Criteria

IM-272A/WDQ Airborne data will be collected and acceptance will be determined by the contractor’s personnel with access to the Air Particle Detector (APD) Noise Limit Specification.

1.3.4 Environmental Criteria

Unless otherwise specified, no special criteria is required. Perform test in standard laboratory environmental conditions.

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1.3.5 Table of Tests

Test Name Paragraph Specification Requirement Airborne Noise 3.0 P&T Specification 3.2.6

1.4 Reference Documents

The following documents are applicable for the IM-272A/WDQ testing.

Title Number Date Source

Performance and Testing Specification

REVISION 02

N/A

08 Mar 2019

Naval Surface Warfare Center

Carderock

Functional Test Procedure 001551 SLI Airborne Sound Measurements and Acceptance Criteria for Shipboard Equipment

MIL-STD-

740-1(SH)

30 December 1986

Department of Defense

Air Particle Detector (APD) Noise Limit Specification

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2.0 Support Requirement

This test requires a low noise background room. The test personnel are required to have a detailed knowledge of IM-272A/WDQ operation and maintenance procedures. There are no unusual electrical, hydraulic or pneumatic requirements. A detailed list of Test Equipment will be provided in the Test Report per Section 4.0. The following specialized equipment is required:

1. Sub-base and mounts, custom manufactured by SLI.

3.0 Test Procedure

3.1 IM-272A/WDQ – Airborne Noise

3.1.1 Setup test fixture and mount IM-272A/WDQ in accordance with MIL-STD-740-1, paragraph 5.5 and the diagram of the test setup herein. Use the SLI-provided sub-base and mounts.

3.1.2 Turn on the IM-272A/WDQ and perform a Functional Test and record on the Functional Test data sheet. Initiate internal data logging.

3.1.3 With IM-272A/WDQ in standard operating mode, collect and record unweighted (Z-scale) 1/3-octave, and narrowband data for each microphone position. Microphone positions shall be as shown in the Diagram of test setup figure herein.

3.1.4 Perform a Functional Test and record on the Functional Test data sheet.

3.2 Cautions and Safety Warnings

Take appropriate precautions required for safe operation during acoustics testing.

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4.0 Data Sheet

Unit Tested:

Step Measurement or Observation Required Value

Observed Value

Pass/Fail

3.1.2 Functional Test Pass

3.1.3 Record all measurements required in

MIL-STD-740-1 paragraph 5.2

As specified by contracting activity

3.1.4 Functional Test Pass

Test Equipment Used Equipment Model Manufacturer Calibration Due

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October 2019. Other requests for this document shall be referred to Naval Sea Systems Command (NAVSEA 04ND).

Diagram of test set up

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Attach photographs of test setup and test performance, any test notes, and the Functional Test data sheets, if required, to the body of the procedure.

Test observations

Test performed by:

Venue:

Date Completed:

Reviewed by:

4.0 Data Sheet